Which of the following statements is not true?Women have two X chromosomesMen have one X chromosome and one Y chromosomeBoth men and women carry two alleles for the colour blindness geneThe Y chromosome is smaller than the X chromosome2Colour blindness is controlled by a sex-linked gene with two alleles on the X chromosome: a dominant normal (N) allele and a recessive colour blind (n) allele. What is the genotype of a female carrier of colour blindness?XNXNXnXnXNXnXnY3What is the genotype of a male with colour blindness?YnXNYNXnYXNYXn4There are four different phenotypes of blood types in humans, which are determined by three different alleles: A, B and O. Which of the following are genotypes of a person with blood group O?IOIO onlyIAIB or IOIOIAIO  or IOIOIBIO  or IOIO5What is meant by the term ‘codominance’?A gene is only found on the X chromosomeTwo different alleles of a gene are expressed equallyOne allele of a gene is dominant over the otherA gene has only one allele

Color blindness is a sex-linked recessive trait. Which of the following statements must be true about color blindness?Group of answer choicesIf a mother is color-blind, then all her daughters will be color-blind.A color-blind boy’s father must also be color-blind.Females cannot be color-blind.A color-blind female must have a color-blind father.

What chromosomes occur in pairs of the same size and contain the same genes in both genders?Multiple choice question.haploid chromosomesautosomesallelessex chromosomes

In humans, if a non-disjunction event led to an individual with a genotype of XXY, they would _____.Group of answer choicesbe female because they have two X chromosomesnot survivedisplay both male and female characteristicsbe male because they have a Y chromosomeNext

X-linked recessive disorders can affect more human males than females because ______ always express the disorder when they inherit the recessive allele from ______.Multiple choice question.males; the fathermales; the motherfemales; the fatherfemales; the mother

Which two of the following affect the transmission pattern of sex-linked genes?Multiple select question.whether the allele codes for a functional proteinthe sex of the offspringwhether there are multiple alleles for the same genewhether the gene is on the X or Y chromosome